Publication
Title
Crystallographic and magnetic characterisation of the brownmillerite $Sr_{2}Co_{2}O_{5}$
Author
Abstract
 Sr2Co2O5 with the perovskite-related brownmillerite structure has been synthesised via quenching, with the orthorhombic unit cell parameters a=5.4639(3) Å, b=15.6486(8) Å and c=5.5667(3) Å based on refinement of neutron powder diffraction data collected at 4 K. Electron microscopy revealed LRLR-intralayer ordering of chain orientations, which require a doubling of the unit cell along the c-parameter, consistent with the assignment of the space group Pcmb. However, on the length scale pertinent to NPD, no long-range order is observed and the disordered space group Imma appears more appropriate. The magnetic structure corresponds to G-type order with a moment of 3.00(4) μB directed along [1 0 0].
Language
English
Source (journal)
Journal of solid state chemistry. - London
Publication
London : 2011
ISSN
0022-4596
Volume/pages
184:3(2011), p. 649-654
ISI
000288587800026
Full text (Publisher's DOI)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address